16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" this grille offers durability and

this grille offers durability and resistance to rust and corrosion

+ Product Details Size - 25"w X 14"h is the size for the duct opening measurement only

+ Product Details Durable Construction - Made with clear

actual front end outer dimensions are approximately 34 5/8" width X 16 5/8" height

+ Product Details Size - 14"w X 14"h X 2"d (for duct opening measurement only)

16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" this grille offers durability and+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 12" OR 12" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 11. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum